Ad hoc mobile network(Mobile Ad hoc Network,MANET) is a kind of wireless mobile networks,which is independent of fixed equipments and can perform self-organizing.Mobile terminals can function as routers and can form any dynamic network topologies through wireless connections.Multicast is widely used in Ad hoc networks,and multicast routing protocol is a key part of Ad hoc networks,so the multicast routing protocol is the hot spot on the studies of Ad discount wedding prom dresses hoc networks.In this thesis,the features of the multicast routing Cheap Lacoste Polo Shirts protocol based both on tree and on mesh are introduced first.Then protocol process,the algorithm of establishing and maintaining the mesh and the way the message forwarded of PUMA are analysed detailedly.And PUMA's shortcoming is shown and the method of using network coding to improve PUMA is proposed.The random network coding uses a distributed algorithm,which does not need the nodes to chi straightener know the topology information of the entire network,and the parameters needed to perform chi flat iron coding can be generated in a Galois Field big enough.All of these features make the polo shirts random network coding very suitable for Ad hoc networks.Based on work mentioned above,we apply the random network chi hair straighteners coding algorithm onto PUMA,and propose the chi dazzle,Network Coding-PUMA,for the first time.Then the message structure and the protocol process are shown in detail.Finally,NC-PUMA is added into the authoritative network simulator NS2 and simulated.The results of the simulation showes that,compared with PUMA,the new protocol NC-PUMA costs less network bandwidth and less energy consumption.The innovations in this thesis are listed below:(1) PUMA is analysed and the flaw is chi hair straightener shown.(2) NC-PUMA protocol is proposed for the first time which uses the random network coding algorithm to improve PUMA.(3) International authoritative simulator NS2 is used to simulate NC-PUM under Linux operating system environment.First NS2 is chi flat iron extended and NC-PUMA is integrated into NS2.Then NC-PUMA is simulated in different scenes of networks. And the results show that NC-PUMA costs less network bandwidth and less energy consumption.
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